.
Thread 3 (process 6578):
#0  0x00007fdc68706aae in __lll_lock_wait_private () from /lib/libc.so.6
#1  0x00007fdc68691bd5 in _L_lock_4814 () from /lib/libc.so.6
#2  0x00007fdc6868e02b in free () from /lib/libc.so.6
#3  0x00007fdc673cd110 in ?? () from /lib/libselinux.so.1
#4  0x00007fdc673c02ff in ?? () from /lib/libselinux.so.1
#5  0x0000000000000000 in ?? ()
.
Thread 2 (process 6591):
#0  0x00007fdc68994537 in __pthread_mutex_cond_lock ()
   from /lib/libpthread.so.0
#1  0x00007fdc6898f374 in pthread_cond_wait@@GLIBC_2.3.2 ()
   from /lib/libpthread.so.0
#2  0x00007fdc6580680b in pa_threaded_mainloop_wait ()
   from /usr/lib/libpulse.so.0
#3  0x00007fdc65a3d302 in pulse_wait_operation ()
   from /usr/lib/alsa-lib/libasound_module_pcm_pulse.so
#4  0x00007fdc65a3c613 in ?? ()
   from /usr/lib/alsa-lib/libasound_module_pcm_pulse.so
#5  0x00007fdc65cd0037 in ?? () from /usr/lib/libasound.so.2
#6  0x00007fdc65c916f6 in snd_pcm_close () from /usr/lib/libasound.so.2
#7  0x00007fdc65f22071 in ?? () from /usr/lib/libcanberra/libcanberra-alsa.so
#8  0x00007fdc65f22631 in ?? () from /usr/lib/libcanberra/libcanberra-alsa.so
#9  0x00007fdc6898b3ea in start_thread () from /lib/libpthread.so.0
#10 0x00007fdc686f8b9d in clone () from /lib/libc.so.6
#11 0x0000000000000000 in ?? ()
.
Thread 1 (process 6590):
#0  0x00007fdc6868e79c in _int_malloc () from /lib/libc.so.6
#1  0x00007fdc686905e8 in malloc () from /lib/libc.so.6
#2  0x00007fdc65808c27 in pa_xmalloc () from /usr/lib/libpulse.so.0
#3  0x00007fdc65817496 in ?? () from /usr/lib/libpulse.so.0
#4  0x00007fdc6581a125 in ?? () from /usr/lib/libpulse.so.0
#5  0x00007fdc657fc66d in pa_mainloop_dispatch () from /usr/lib/libpulse.so.0
#6  0x00007fdc657fc8f6 in pa_mainloop_iterate () from /usr/lib/libpulse.so.0
#7  0x00007fdc657fc9b0 in pa_mainloop_run () from /usr/lib/libpulse.so.0
#8  0x00007fdc65806d6d in ?? () from /usr/lib/libpulse.so.0
#9  0x00007fdc65823400 in ?? () from /usr/lib/libpulse.so.0
#10 0x00007fdc6898b3ea in start_thread () from /lib/libpthread.so.0
#11 0x00007fdc686f8b9d in clone () from /lib/libc.so.6
#12 0x0000000000000000 in ?? ()